Improvement in door-keys



` waited 5eme peut can,

JAMES BRADY; OE BRANFORD, CONNECTICUT, ASSIGNORTO THE BRAN- EORD LOCKWORKS, OE SAME PLACE.

Lettere Patent No. 103,837, dated June 7, 1870.

IMPROVEMENT IN DOOR-KEYS.

The Schedule referred to in these Letters Patent and making part of thesame.

Tol all whom it may concern `Be it known that I, JAMES BRADY, ofBranford, in the county of New Haven and State of Connecticut, haveinvented a new Improvement in Door- Keys and I do' hereby declare thefollowing, when taken in connection with the accompanying drawingsandthe letters .of reference marked thereon, to be a full, clear, andexact description of the same, and which said drawings constitute partof this specification, and represent in Figure 1, a perspective view;

Figures 2 and 3, a perspective view of' the two parts detached; and in AFigure 4, an end view of the key.

This invention relates to an improvement in common door-keys, the objectbeing to construct the key, in a simple and cheap manner, from sheetmetal, so that the spindle of the key .will he able to form a bearingwithin the key-hole of the lock, upon which to turn the key.

Heretofore this class of keys has been formed from cast metal, withround spindles, which necessitates no inconsiderable expense in tting upthe keys, or, if folmed from sheet metal, a semi-cylindrical piece hasbeen brazed upon each side of the spindle to make it round, and thisconstruction makes a still more expensive key than a key of east metal.

By `my invention the expense of manufacture is greatly reduced, andconsists in v-a dat sheet-metal key, constructed with a transverse slotin its bit end, and combined with a transverse forked piece, of similarsheet metal, fitting into the fork, making the bit end of the spindle inthe transverse section the form of a so that, when the two parts aresecured together, the extremes of the -lwill form a bearing each beingcentrally located in the other, as seen iu fig. 1, so that the sectionof the'spindle will be as seen in g. 4, so as to form a bearing for theturning of' the key. The two parts, when thus fitted together, are

brazed or secured together by any known process.

With the known facilities for striking blanks from sheet metal, it willbe evident to those skilled in the art that the cost of this key is verylittle more than the metal itself, while, for all practical purposes,the bearing in the lock is equally as good as if the spindle at thatpoint was a complete-cylinder.

I claim as my inventiong As a new article of manufacture,'a sheet-metalkey, both the key and the piece A slotted to set oneinto the other,making the transverse section of the bit end of the spindle of shape,constructed with a transverse piece, A, tted'centrally onto the spindleof the key, as and for the purpose specied.

J AMES BRADY. Witnesses:

JOHN H. SHUMWAY, A. 'J TIBBITs.

